Re: Z-ADD or Eval?

[Scott Klement <klemscot@xxxxxxxxxxxx>]

Ummm...  why would Z-Add be more efficient than MOVE? That seems odd to
me.  Math is slower than just moving bytes around...
 
Your code doesn't look modern to me because it uses an indicator :)
You should find a way to do this that doesn't involve an indicator.

If you're only doing a single line of code (as in your examples) I find
conditioning indicators to be just as good as if statements.  But, if
you're going to do more than one line of code conditioned on that same
indicator, the "if" technique is better.

This is how I code things like that, when I _must_ use indicators:

c   99              eval       EqSize = 0                         

or:
      
c                   if         *in99                                    
c                   eval       EqSize = 0                               
c                   endif                                               

I doubt I'll ever use Z-ADD again.  :)


On Tue, 22 Aug 2000, Jim Langston wrote:

> I am trying to use all Evals in my programming just because it is much easier 
>to read and understand.
> 
> My question is, however, should I be converting Z-ADDs to Evals?  I 
>understand we use(d) Z-ADD
> instead of MOVE because Z-ADD was more effiecient.  We could of used MOVE, 
>but we used Z-ADD.
> Now, if I have a statement (and I do):
> 
>       C   99              Z-ADD     *ZERO         EQSIZE
> 
> and I want to convert this to "modern" programming, should it become:
> 
>       C                   If       *IN99
>       C                   Z-Add     *Zero         EqSize
>       C                   EndIf
> 
> or should it become:
> 
>       C                   If       *IN99
>       C                   Eval      EqSize = *Zero
>       C                   EndIf
> 
> Any comments on this are appreciated.
> 
> Regards,
> 
> Jim Langston
> 

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